a) Vitamin C helps in absorption of iron, preventing infection and healing of wounds. (0.5 marks)
Vitamin D helps in absorption of calcium and growth of healthy bones and teeth. (0.5 marks)
b) Deficiency of vitamin C causes scurvy which leads to bleeding gums. (0.5 marks)
Deficiency of vitamin D causes rickets which leads to soft and weak bones. (0.5 marks)